Tata Docomo — tata docomo sim not detecting

Address:

Coimbatore, Tamil Nadu, 641001

Dear Tata docomo executive,

My sim card is not detected in any hand set and the number i am using is very important since i am using the same for 8 years. All of a sudden, network connectivity is not establishing in any headset. Locality is Coimbatore, Tamilnadu. Requesting you to support either to provide a duplicate sim/fix the existing one and the problem is tata docomo offices are not located nearby.